1, 10 to 20 minutes. The cooking time of sweet potato is related to the size of sweet potato. It takes 10-20 minutes to cook sweet potatoes in pressure cooker, generally 20 minutes after opening the exhaust valve, and 10 minutes for small sweet potatoes. The pressure cooker can make the water reach a higher temperature without boiling, which can not only speed up the cooking of sweet potatoes, but also promote the better conversion of amylase into sugar.

2. Sweet potato (scientific name: sweet potato. ) Also called Ganchu, Sweet Potato, Bamboo Tree, Fanru, Red Yam, Jade Pillow Potato, Sweet Potato, Sweet Potato, Goose, and Monty Sweet Potato. Millet has round, oval or spindle-shaped tuberous roots in the underground part, and the stems are horizontal or ascending, with occasional twining and multi-branching. The shape and color of leaves often vary with varieties, usually with wide oval shape and different petioles. Cymes axillary, capsules ovoid or oblate, 1-4, usually 2, glabrous.

3. Sweet potato is native to South America and large and small Antilles. Widely cultivated in tropical and subtropical regions all over the world, and also widely cultivated in most parts of China. Sweet potato is a kind of food crop with high yield and strong adaptability, which is closely related to industrial and agricultural production and people's life. Truffle is not only the main grain, but also an important raw material for food processing, starch and alcohol manufacturing industries. Roots, stems and leaves are excellent feeds.